If you're looking for a bright sounding mouthpiece with a full sounding low register capable of producing lush sub tones, the Dave Guardala Tenor "King" Silver is the one you want. This mouthpiece is great for R&B, Rock, and both Straight Ahead and Smooth Jazz. I bought this mouthpiece to replace an older laser trim Guardala King and found that this model, enhanced by Nadir, is even better. This mouthpiece has plenty of edge without sounding shrill or harsh. This is the first time I've done business with Thomann Music and it will not be last.